METHOD OF PRODUCTION OF PRODUCER GAS AND DEVICE FOR REALIZATION OF THIS METHOD Russian patent published in 2007 - IPC C10J3/68 C10J3/74 C10J3/82 

FIELD: thermal processing of solid fuel.

SUBSTANCE: proposed method consists in pyrolysis and gasifying of solid fuel at temperature of 580-600°C at excess air coefficient of 0.15-0.25; processes are carried out simultaneously in suspended state in single reaction volume. Proposed method includes loading poly-dispersed fuel at size of particles no more than 10 mm followed by tangential feed of flow of air to both reaction zones preheated to temperature not below 300°C at rate of 7-15 nm/s. Air to pyrolysis zone is additionally fed by multi-jet flow directed radially. Flow rate of air is so adjusted that flow rate in gasifying zone exceeds that in pyrolysis zone by 1.5-2.5 times, thus ensuring continuous circulation of fuel till complete combustion. Device proposed for realization of this method has vertical metal housing which is cylindrical in upper and lower parts; in middle part housing is made in form of truncated cone. Housing is provided with cover having fuel loading hatch and with nozzles in pyrolysis and gasifying zones for tangential feed of air flow, system for discharge of producer gas in form of tube with cap located inside housing coaxially relative to it. Wall of housing in pyrolysis zone is provided with through perforations for forming multi-jet flow of air. Proposed method excludes use of refractory materials and special preparation of fuel, enhances ecological safety through reduction of contaminants by 3-5 times. There is no need in special training of attending personnel. Method provides for compensation for expenses for equipment during a period from 2 months to one year. Usage of metal is reduced by 3-7 times and cost of device is reduced by 1.5-3 times as compared with domestic analogs and by 3-5 times as compared with import analogs.

EFFECT: enhanced efficiency; increased service life of device; enhanced ecological safety.

3 cl, 1 dwg, 1 ex